The Collaborative International Dictionary of English v.0.48:

Cark \Cark\ (k[aum]rk), v. i.
   To be careful, anxious, solicitous, or troubled in mind; to
   worry or grieve. [R.] --Beau. & Fl.
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The Collaborative International Dictionary of English v.0.48:

Cark \Cark\, v. t.
   To vex; to worry; to make by anxious care or worry. [R.]
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         Nor can a man, independently . . . of God's blessing,
         care and cark himself one penny richer.  --South.
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The Collaborative International Dictionary of English v.0.48:

Cark \Cark\ (k[aum]rk), n. [OE. cark, fr. a dialectic form of F.
   charge; cf. W. carc anxiety, care, Arm karg charge, burden.
   See Charge, and cf. Cargo.]
   A noxious or corroding care; solicitude; worry. [Archaic.]
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         His heavy head, devoid of careful cark.  --Spenser.
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         Fling cark and care aside.               --Motherwell.
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         Freedom from the cares of money and the cark of
         fashion.                                 --R. D.
                                                  Blackmore.
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WordNet (r) 3.0 (2006):

cark
    v 1: disturb in mind or make uneasy or cause to be worried or
         alarmed; "She was rather perturbed by the news that her
         father was seriously ill" [syn: perturb, unhinge,
         disquiet, trouble, cark, distract, disorder]